"Speak of the Devil!""It's not my turn to be the Devil.""Oh right.... it's my turn, but I've studied."

2. Zen version:

They ask you to move a mountain but will not buy you equipment or explosives. You notice a stream runs past the base of the mountain, buy a small house, and spend your mornings picking up sand off the bottom of the stream and dropping it back in the water to watch it flow toward the mountain. You grow old but you attain your goal and the water does all the heavy lifting.